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Hello,
after some research on the net, I can't find any info on a servo timeline. (KO, Sanwa/Airtronics, Futaba)
I'm more interested in the 90's period.
I have a PS1001, but what was the other common servos used?

Maybe we could use this thread to make one.


90's period:


Ko Propo

PS1001 fet


Futaba

S131sh


Airtronics:

94151
94737

Futaba - s131sh

Airtronics - 94151, 94737

Obviously, there are others. I tend to look through race articles to get an idea of what electronics were being used by the top drivers in specific years. Really helps in building period correct cars.

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Thanks for all that information mates.

For servo specs I use servodatabase.com which is a pretty good site.
Yes, the trouble is to find the release date, to get an electronic period correct rebuild.

I'll edit the first post with the period info you gave me ... Thanks for you're help.

could just find time period of car. and start with the vintage car actions of time. look at sales adds. older might need rc modler or so airplane mags.

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I can add:

1993: KoPropo ps1003 fet

Like has been said the only way to pin point this is through research. finding old race reports and magazine adverts. Even eye witness information can be useful but should be taken with a pinch of salt.

Here is a whole bunch of stuff to be taken with a pinch of salt, based on my memory from back in the mid 80's

In the mid 80's Futaba was king until KO propo came along with the FET servo's at the end of 1987.

The top 1/12th mini servo was the S132H (J plug) S32H (G plug). pretty much the fastest servo available until the KO propo PS-87 came along. 0.13' 60 deg v 0.10' 60 deg. Anecdotally Joel Jhonson used the S132H in his worlds winning ultima 1987. Masami using the Ko PS-87 FET.

The buggy servo of the day was the S131SH (j plug) S31SH (G plug) , obsoleting the previous favourite the S131S (used by Jay Halsey to win 1985 worlds). The S131SH was pretty fast at 0'16' 60 deg and almost twice the torque of the smaller S132H.

This servo was still going strong in the early 90's being a lot cheaper than the Ko servos. In 1991 or so the servo was re-branded as the S9401.

Another servo I find interesting is the Futaba S135S this is a micro servo which came out ~1988 smaller than the mini size S132H not quite as fast but with 30% more torque. 0.13' v 0.15' 60deg. Torque of 25 oz/inch v 36 oz/inch. I ran one of these in my Schumacher SPC car 1988.
The S135S was also re-branded S9601.

Standard servos. As far as I remember the servos included in radio sets was the S128 being replaced in ~87/88 by the S148 (still in production today)

For commercial reasons in a similar way to Sanwa branding as Airtronics in some markets, Futaba branded as Robbe in some European countries (Germany, Belgium others...) Most of the Futaba servos where also available under the Robbe name although with a different numbering scheme.

I would like to find out the Robbe part Numbers for The S131SH S132H and S131S, if anyone knows.

The only one I know for sure is Futaba S48 (G plug) = Robbe RS100S